def dl_url(url, dest):
    '''download passed url to dest file (include filename)'''
    import urllib.request
    import time
    start_time = time.time()
    with urllib.request.urlopen(url) as response, open(dest, 'wb') as out_file:
        shutil.copyfileobj(response, out_file)
    print(f"Download time {time.time() - start_time:.2f}s",)